projects / sigrok-dumps.git / blame
| Commit | Line | Data |
|---|---|---|
| c7b21bde GS |
1 | ------------------------------------------------------------------------------- |
| 2 | Maxim Integrated DS3231 RTC | |
| 3 | ------------------------------------------------------------------------------- | |
| 4 | ||
| 5 | Details: | |
| 6 | - DS3231 datasheet: https://datasheets.maximintegrated.com/en/ds/DS3231.pdf | |
| 7 | ||
| 8 | ||
| 9 | Logic analyzer setup | |
| 10 | -------------------- | |
| 11 | ||
| 12 | The logic analyzer used was Geeetech Mini Board Cypress FX2(LP) eval board | |
| 13 | with fx2lafw firmware (at 4MHz): | |
| 14 | ||
| 15 | Probe DS3231 pin | |
| 16 | ------------------------- | |
| 17 | 0 SCL | |
| 18 | 1 SDA | |
| 19 | ||
| 20 | ||
| 21 | ds3231_ex1.sr | |
| 22 | ---------------------- | |
| 23 | ||
| 24 | The file provides reading/writing of time keeping registers as well as | |
| 25 | control, control/status and temperature registers of the RTC chip, which | |
| 26 | was setup to 24-hours mode: | |
| 27 | ||
| 28 | - Read Control register | |
| 29 | - Write Control register - disable alarms | |
| 30 | - Read Control/Status register | |
| 31 | - Write Control/Status register - clear alarm's flags | |
| 32 | - Write Alarm 1 registers - set Alarm 1 at every 1st date | |
| 33 | - Write Alarm 2 registers - set Alarm 2 at every minute | |
| 34 | - Read date/time | |
| 35 | - Read temperature (MSB) | |
| 36 | ||
| 37 | ||
| 38 | ds3231_ex2.sr | |
| 39 | ---------------------- | |
| 40 | ||
| 41 | The file provides reading/writing of time keeping registers as well as | |
| 42 | control/status and temperature registers of the RTC chip, which was setup | |
| 43 | to 24-hours mode and after Alarm 2 occured: | |
| 44 | ||
| 45 | - Read Control/Status register | |
| 46 | - Write Control/Status register - clear alarm flag | |
| 47 | - Read date/time | |
| 48 | - Read temperature (MSB) |